Factory Direct Wholesale FTP Cat5e Patch Cord 23Awg Lan Cable
You may notice that as the category number gets higher, so does the speed and Mhz of the wire. This is not a coincidence, because each category brings more stringent testing for adding isolation between the wires.
Category 5 cable was revised in 2001, and mostly replaced with Category 5 Enhanced (CAT5e) cable which did not change anything physically in the cable, but instead applied more stringent testing standards for crosstalk. Category 6 was revised between 2002 with Category 6 Augmented (CAT6a) in 2008 that provided testing for 500 Mhz communication (compared to CAT6? 250 Mhz). The higher communication frequency eliminated alien crosstalk (AXT) which allows for longer range at 10 Gb/s.